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isomp4: Check presence of mfhd in moof

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The 'mfhd' atom is mandatory in 'moof'. We can later on check whether
the fragment number properly increases
This commit is contained in:
Edward Hervey 2014-11-26 16:04:26 +01:00
parent 5e3e97353d
commit 5b5e9f320f
1 changed files with 33 additions and 2 deletions
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35
gst/isomp4/qtdemux.c
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@ -2669,6 +2669,22 @@ qtdemux_find_stream (GstQTDemux * qtdemux, guint32 id)
return NULL;
}
static gboolean
qtdemux_parse_mfhd (GstQTDemux * qtdemux, GstByteReader * mfhd,
guint32 * fragment_number)
{
if (!gst_byte_reader_skip (mfhd, 4))
goto fail;
if (!gst_byte_reader_get_uint32_be (mfhd, fragment_number))
goto fail;
return TRUE;
fail:
{
GST_WARNING_OBJECT (qtdemux, "Failed to parse mfhd atom");
return FALSE;
}
}
static gboolean
qtdemux_parse_tfhd (GstQTDemux * qtdemux, GstByteReader * tfhd,
QtDemuxStream ** stream, guint32 * default_sample_duration,
@ -2764,10 +2780,11 @@ static gboolean
qtdemux_parse_moof (GstQTDemux * qtdemux, const guint8 * buffer, guint length,
guint64 moof_offset, QtDemuxStream * stream)
{
GNode *moof_node, *traf_node, *tfhd_node, *trun_node, *tfdt_node;
GstByteReader trun_data, tfhd_data, tfdt_data;
GNode *moof_node, *traf_node, *tfhd_node, *trun_node, *tfdt_node, *mfhd_node;
GstByteReader mfhd_data, trun_data, tfhd_data, tfdt_data;
guint32 ds_size = 0, ds_duration = 0, ds_flags = 0;
gint64 base_offset, running_offset;
guint32 frag_num;
/* NOTE @stream ignored */
@ -2775,6 +2792,15 @@ qtdemux_parse_moof (GstQTDemux * qtdemux, const guint8 * buffer, guint length,
qtdemux_parse_node (qtdemux, moof_node, buffer, length);
qtdemux_node_dump (qtdemux, moof_node);
/* Get fragment number from mfhd and check it's valid */
mfhd_node =
qtdemux_tree_get_child_by_type_full (moof_node, FOURCC_mfhd, &mfhd_data);
if (mfhd_node == NULL)
goto missing_mfhd;
if (!qtdemux_parse_mfhd (qtdemux, &mfhd_data, &frag_num))
goto fail;
GST_DEBUG_OBJECT (qtdemux, "Fragment #%d", frag_num);
/* unknown base_offset to start with */
base_offset = running_offset = -1;
traf_node = qtdemux_tree_get_child_by_type (moof_node, FOURCC_traf);
@ -2843,6 +2869,11 @@ missing_tfhd:
GST_DEBUG_OBJECT (qtdemux, "missing tfhd box");
goto fail;
}
missing_mfhd:
{
GST_DEBUG_OBJECT (qtdemux, "Missing mfhd box");
goto fail;
}
lost_offset:
{
GST_DEBUG_OBJECT (qtdemux, "lost offset");